add flake, copytoram boot image, wip pxe
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illustris
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2
.gitignore
vendored
2
.gitignore
vendored
@ -1 +1,3 @@
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*~
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*~
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result
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*.qcow2
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141
README.md
141
README.md
@ -104,11 +104,152 @@ python3 --version
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---
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---
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## Nix-Based Setup (Alternative)
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This workshop includes a Nix flake for reproducible environments. Use this if you have Nix installed or want a pre-configured bootable image.
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### Quick Reference
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| Goal | Command |
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|------|---------|
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| Dev shell with all tools | `nix develop` |
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| Apply tools to Ubuntu | `nix run github:numtide/system-manager -- switch --flake .` |
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| Build bootable USB ISO | `nix build .#iso` |
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| Build netboot files | `nix build .#netboot` |
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### Development Shell
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Get all workshop tools in your current shell without installing anything system-wide:
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```bash
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cd perf-workshop
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nix develop
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# Now you have: perf, strace, py-spy, bpftrace, hyperfine, valgrind, flamegraph, pyroscope
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perf --version
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py-spy --help
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```
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### System-Manager (Ubuntu/Debian)
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Install all workshop tools on an existing Ubuntu system using Nix:
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```bash
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# Apply the configuration (installs tools via Nix)
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nix run 'github:numtide/system-manager' -- switch --flake .
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# Configure perf permissions (system-manager can't do this)
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sudo /etc/perf-workshop-setup.sh
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```
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This installs tools into `/nix/store` and adds them to your PATH without conflicting with apt packages.
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### Bootable USB Image
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Build a complete NixOS image with XFCE desktop, all tools pre-installed, and workshop materials:
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```bash
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# Build the ISO (~4-5 GB)
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nix build .#iso
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# Flash to USB (replace sdX with your device)
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sudo dd if=result/iso/*.iso of=/dev/sdX bs=4M status=progress conv=fsync
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```
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**ISO Features:**
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- XFCE desktop with auto-login (user: `workshop`, password: `workshop`)
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- `copytoram` enabled — boots from USB, runs entirely from RAM (USB can be removed after boot)
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- `kernel.perf_event_paranoid=1` pre-configured
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- Workshop materials in `/home/workshop/perf-workshop`
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- Desktop shortcut to open terminal in workshop directory
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- SSH enabled for remote access
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**Requirements:** 8+ GB RAM recommended (the system runs from RAM)
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### Netboot over LAN
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For workshops with many participants, netboot is more efficient than flashing multiple USBs.
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```bash
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# Build netboot bundle
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nix build .#netboot
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cd result
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# Contents:
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# - bzImage (kernel)
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# - initrd (initrd with full system, ~2-4 GB)
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# - netboot.ipxe (iPXE boot script)
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```
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**Option 1: Pixiecore (easiest)**
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Pixiecore is an all-in-one PXE server — just point it at the files:
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```bash
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nix shell nixpkgs#pixiecore
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# Serve on your LAN (requires root for DHCP proxy)
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sudo pixiecore boot bzImage initrd \
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--cmdline "$(grep -oP 'imgargs.*? \K.*' netboot.ipxe)"
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```
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Participants set their BIOS to network boot and get the workshop environment automatically.
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**Option 2: dnsmasq + HTTP server**
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For more control or integration with existing infrastructure:
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```bash
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# Terminal 1: Serve files over HTTP
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python3 -m http.server 8080
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```
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Configure dnsmasq (`/etc/dnsmasq.d/workshop.conf`):
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```ini
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interface=eth0
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dhcp-range=192.168.1.100,192.168.1.200,12h
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enable-tftp
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tftp-root=/path/to/result
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dhcp-boot=netboot.ipxe
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```
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**Option 3: Existing PXE infrastructure**
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Copy files to your TFTP/HTTP server and configure your DHCP server to serve `netboot.ipxe`.
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### Flake Outputs Reference
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```bash
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# List all outputs
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nix flake show
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# Available outputs:
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# - devShells.x86_64-linux.default # Development shell
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# - packages.x86_64-linux.iso # Bootable ISO image
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# - packages.x86_64-linux.netboot # Netboot bundle (kernel + initrd + ipxe)
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# - packages.x86_64-linux.netboot-kernel
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# - packages.x86_64-linux.netboot-initrd
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# - packages.x86_64-linux.netboot-ipxe
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# - nixosConfigurations.workshop-iso # NixOS config for ISO
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# - nixosConfigurations.workshop-netboot # NixOS config for netboot
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# - systemConfigs.default # system-manager config for Ubuntu
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```
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---
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## Directory Structure
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## Directory Structure
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```
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```
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perf-workshop/
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perf-workshop/
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├── README.md # This file
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├── README.md # This file
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├── flake.nix # Nix flake (dev shell, ISO, netboot)
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├── flake.lock # Locked dependencies
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├── nix/
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│ ├── packages.nix # Shared package list
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│ ├── common.nix # Common NixOS configuration
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│ ├── iso.nix # ISO-specific configuration
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│ ├── netboot.nix # Netboot-specific configuration
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│ └── system-manager.nix # Ubuntu system-manager module
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├── common/
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├── common/
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│ └── CHEATSHEET.md # Quick reference card
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│ └── CHEATSHEET.md # Quick reference card
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├── scenario1-python-to-c/
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├── scenario1-python-to-c/
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82
flake.lock
generated
Normal file
82
flake.lock
generated
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{
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"nodes": {
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"flake-utils": {
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"inputs": {
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"systems": "systems"
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},
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"locked": {
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"lastModified": 1731533236,
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"narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
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"owner": "numtide",
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"repo": "flake-utils",
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"rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
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"type": "github"
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},
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"original": {
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"owner": "numtide",
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"repo": "flake-utils",
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"type": "github"
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}
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},
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"nixpkgs": {
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"locked": {
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"lastModified": 1767767207,
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"narHash": "sha256-Mj3d3PfwltLmukFal5i3fFt27L6NiKXdBezC1EBuZs4=",
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"owner": "nixos",
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"repo": "nixpkgs",
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"rev": "5912c1772a44e31bf1c63c0390b90501e5026886",
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"type": "github"
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},
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"original": {
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"owner": "nixos",
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"ref": "nixos-unstable",
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"repo": "nixpkgs",
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"type": "github"
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}
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},
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"root": {
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"inputs": {
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"flake-utils": "flake-utils",
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"nixpkgs": "nixpkgs",
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"system-manager": "system-manager"
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}
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},
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"system-manager": {
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"inputs": {
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"nixpkgs": [
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"nixpkgs"
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]
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},
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"locked": {
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"lastModified": 1767765652,
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"narHash": "sha256-brTUOSGRmUCU0xJZI/aD5jUYZJm4RhqMRfkzS4veohg=",
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"owner": "numtide",
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"repo": "system-manager",
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"rev": "85610060c48a0b9f1883d5b2525866fc6ddbbe03",
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"type": "github"
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},
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"original": {
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"owner": "numtide",
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"repo": "system-manager",
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"type": "github"
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}
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},
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"systems": {
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"locked": {
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"lastModified": 1681028828,
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"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
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"owner": "nix-systems",
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"repo": "default",
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"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
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"type": "github"
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},
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"original": {
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"owner": "nix-systems",
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"repo": "default",
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"type": "github"
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}
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}
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},
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"root": "root",
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"version": 7
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}
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144
flake.nix
Normal file
144
flake.nix
Normal file
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{
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description = "Linux Performance Engineering Workshop";
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inputs = {
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nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
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system-manager = {
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url = "github:numtide/system-manager";
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inputs.nixpkgs.follows = "nixpkgs";
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};
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flake-utils.url = "github:numtide/flake-utils";
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};
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outputs = { self, nixpkgs, system-manager, flake-utils }:
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let
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# Workshop source for embedding in ISO
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workshopSrc = builtins.path {
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path = ./.;
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name = "perf-workshop";
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filter = path: type:
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let
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baseName = baseNameOf path;
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in
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# Exclude nix build artifacts and git
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!(baseName == "result" ||
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baseName == ".git" ||
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baseName == "flake.lock" ||
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nixpkgs.lib.hasSuffix "~" baseName);
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};
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in
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flake-utils.lib.eachSystem [ "x86_64-linux" "aarch64-linux" ] (system:
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let
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pkgs = nixpkgs.legacyPackages.${system};
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workshopPackages = import ./nix/packages.nix { inherit pkgs; };
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in
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{
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# Development shell with all workshop tools
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devShells.default = pkgs.mkShell {
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packages = workshopPackages;
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shellHook = ''
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echo "Linux Performance Workshop Development Environment"
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echo ""
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echo "Available tools: perf, strace, py-spy, hyperfine, bpftrace, ..."
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echo "Run 'make' in any scenario directory to build examples"
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'';
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};
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# Package containing workshop materials
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packages.workshop-materials = pkgs.runCommand "workshop-materials" {} ''
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mkdir -p $out/share/perf-workshop
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cp -r ${workshopSrc}/* $out/share/perf-workshop/
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'';
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}
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) // {
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# System-manager configuration for Ubuntu
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systemConfigs.default = system-manager.lib.makeSystemConfig {
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modules = [
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./nix/system-manager.nix
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];
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};
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# NixOS configuration for bootable workshop ISO
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nixosConfigurations.workshop-iso = nixpkgs.lib.nixosSystem {
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system = "x86_64-linux";
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specialArgs = { inherit workshopSrc; };
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modules = [
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"${nixpkgs}/nixos/modules/installer/cd-dvd/installation-cd-graphical-base.nix"
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./nix/iso.nix
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];
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};
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# NixOS configuration for netboot
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nixosConfigurations.workshop-netboot = nixpkgs.lib.nixosSystem {
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system = "x86_64-linux";
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specialArgs = { inherit workshopSrc; };
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modules = [
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"${nixpkgs}/nixos/modules/installer/netboot/netboot.nix"
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"${nixpkgs}/nixos/modules/installer/cd-dvd/installation-cd-graphical-base.nix"
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./nix/netboot.nix
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];
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};
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# Convenient alias for building the ISO
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packages.x86_64-linux.iso =
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self.nixosConfigurations.workshop-iso.config.system.build.isoImage;
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# Netboot artifacts
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packages.x86_64-linux.netboot-kernel =
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self.nixosConfigurations.workshop-netboot.config.system.build.kernel;
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packages.x86_64-linux.netboot-initrd =
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self.nixosConfigurations.workshop-netboot.config.system.build.netbootRamdisk;
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packages.x86_64-linux.netboot-ipxe =
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self.nixosConfigurations.workshop-netboot.config.system.build.netbootIpxeScript;
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# Bundle netboot files for easy serving
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packages.x86_64-linux.netboot = let
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pkgs = nixpkgs.legacyPackages.x86_64-linux;
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cfg = self.nixosConfigurations.workshop-netboot.config;
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kernel = "${cfg.system.build.kernel}/bzImage";
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initrd = "${cfg.system.build.netbootRamdisk}/initrd";
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in pkgs.runCommand "workshop-netboot" {} ''
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mkdir -p $out
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ln -s ${kernel} $out/bzImage
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ln -s ${initrd} $out/initrd
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cp ${cfg.system.build.netbootIpxeScript} $out/netboot.ipxe
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cat > $out/README.md << 'EOF'
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# Workshop Netboot Files
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## Quick Start with Pixiecore (easiest)
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```bash
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# Serve on your LAN (requires root for DHCP)
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sudo pixiecore boot bzImage initrd --cmdline "$(grep -oP 'imgargs.*? \K.*' netboot.ipxe)"
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```
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## Using dnsmasq + HTTP server
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||||||
|
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||||||
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1. Start HTTP server in this directory:
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```bash
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python3 -m http.server 8080
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```
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||||||
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||||||
|
2. Configure dnsmasq (adjust interface/IP):
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||||||
|
```
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interface=eth0
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dhcp-range=192.168.1.100,192.168.1.200,12h
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enable-tftp
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tftp-root=/path/to/this/dir
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dhcp-boot=netboot.ipxe
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```
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||||||
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3. For UEFI clients, you may need iPXE chainloading.
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||||||
|
|
||||||
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## Files
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||||||
|
|
||||||
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- bzImage: Linux kernel
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||||||
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- initrd: Initial ramdisk (contains full system)
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||||||
|
- netboot.ipxe: iPXE boot script
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||||||
|
EOF
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|
'';
|
||||||
|
};
|
||||||
|
}
|
||||||
100
nix/common.nix
Normal file
100
nix/common.nix
Normal file
@ -0,0 +1,100 @@
|
|||||||
|
# Common NixOS configuration shared between ISO and netboot
|
||||||
|
{ config, lib, pkgs, workshopSrc, ... }:
|
||||||
|
|
||||||
|
let
|
||||||
|
workshopPackages = import ./packages.nix {
|
||||||
|
inherit pkgs;
|
||||||
|
kernelPackages = config.boot.kernelPackages;
|
||||||
|
};
|
||||||
|
in
|
||||||
|
{
|
||||||
|
# System identification
|
||||||
|
system.stateVersion = "24.11";
|
||||||
|
|
||||||
|
# Use a recent stable kernel
|
||||||
|
boot.kernelPackages = pkgs.linuxPackages_6_12;
|
||||||
|
|
||||||
|
# Set perf permissions for non-root users
|
||||||
|
boot.kernel.sysctl = {
|
||||||
|
"kernel.perf_event_paranoid" = 1;
|
||||||
|
"kernel.kptr_restrict" = 0; # Allow reading kernel symbols
|
||||||
|
};
|
||||||
|
|
||||||
|
# Workshop packages
|
||||||
|
environment.systemPackages = workshopPackages ++ (with pkgs; [
|
||||||
|
# Additional GUI utilities
|
||||||
|
firefox # for viewing flamegraphs
|
||||||
|
xfce4-terminal
|
||||||
|
]);
|
||||||
|
|
||||||
|
# Create workshop user with auto-login
|
||||||
|
users.users.workshop = {
|
||||||
|
isNormalUser = true;
|
||||||
|
description = "Workshop User";
|
||||||
|
extraGroups = [ "wheel" "video" "audio" "networkmanager" ];
|
||||||
|
initialPassword = "workshop";
|
||||||
|
home = "/home/workshop";
|
||||||
|
};
|
||||||
|
|
||||||
|
# Auto-login to workshop user
|
||||||
|
services.displayManager.autoLogin = {
|
||||||
|
enable = true;
|
||||||
|
user = "workshop";
|
||||||
|
};
|
||||||
|
|
||||||
|
# Allow passwordless sudo for workshop user
|
||||||
|
security.sudo.wheelNeedsPassword = false;
|
||||||
|
|
||||||
|
# XFCE desktop environment
|
||||||
|
services.xserver.desktopManager.xfce.enable = true;
|
||||||
|
services.displayManager.defaultSession = "xfce";
|
||||||
|
|
||||||
|
# Embed workshop materials into home directory
|
||||||
|
system.activationScripts.workshopMaterials = ''
|
||||||
|
mkdir -p /home/workshop/perf-workshop
|
||||||
|
cp -rT ${workshopSrc} /home/workshop/perf-workshop
|
||||||
|
chmod -R u+w /home/workshop/perf-workshop
|
||||||
|
chown -R workshop:users /home/workshop/perf-workshop
|
||||||
|
'';
|
||||||
|
|
||||||
|
# Desktop shortcut for workshop
|
||||||
|
environment.etc."skel/Desktop/Workshop.desktop".text = ''
|
||||||
|
[Desktop Entry]
|
||||||
|
Type=Application
|
||||||
|
Name=Performance Workshop
|
||||||
|
Comment=Open terminal in workshop directory
|
||||||
|
Exec=xfce4-terminal --working-directory=/home/workshop/perf-workshop
|
||||||
|
Icon=utilities-terminal
|
||||||
|
Terminal=false
|
||||||
|
Categories=Development;
|
||||||
|
'';
|
||||||
|
|
||||||
|
# Copy desktop shortcut for workshop user
|
||||||
|
system.activationScripts.workshopDesktop = ''
|
||||||
|
mkdir -p /home/workshop/Desktop
|
||||||
|
cp /etc/skel/Desktop/Workshop.desktop /home/workshop/Desktop/
|
||||||
|
chown -R workshop:users /home/workshop/Desktop
|
||||||
|
chmod +x /home/workshop/Desktop/Workshop.desktop
|
||||||
|
'';
|
||||||
|
|
||||||
|
# Networking
|
||||||
|
networking = {
|
||||||
|
hostName = "perf-workshop";
|
||||||
|
networkmanager.enable = true;
|
||||||
|
};
|
||||||
|
|
||||||
|
# Enable SSH for remote access (useful for debugging)
|
||||||
|
services.openssh = {
|
||||||
|
enable = true;
|
||||||
|
settings = {
|
||||||
|
PermitRootLogin = "no";
|
||||||
|
PasswordAuthentication = true;
|
||||||
|
};
|
||||||
|
};
|
||||||
|
|
||||||
|
# Timezone (can be changed by user)
|
||||||
|
time.timeZone = "Asia/Kolkata";
|
||||||
|
|
||||||
|
# Locale
|
||||||
|
i18n.defaultLocale = "en_US.UTF-8";
|
||||||
|
}
|
||||||
17
nix/iso.nix
Normal file
17
nix/iso.nix
Normal file
@ -0,0 +1,17 @@
|
|||||||
|
# NixOS ISO-specific configuration
|
||||||
|
{ config, lib, pkgs, workshopSrc, ... }:
|
||||||
|
|
||||||
|
{
|
||||||
|
imports = [ ./common.nix ];
|
||||||
|
|
||||||
|
# Enable copytoram - boots from USB, runs entirely from RAM
|
||||||
|
boot.kernelParams = [ "copytoram" ];
|
||||||
|
|
||||||
|
# ISO image customization
|
||||||
|
isoImage = {
|
||||||
|
volumeID = lib.mkForce "PERF_WORKSHOP";
|
||||||
|
makeEfiBootable = true;
|
||||||
|
makeUsbBootable = true;
|
||||||
|
};
|
||||||
|
image.fileName = lib.mkForce "perf-workshop-${config.system.nixos.label}-x86_64.iso";
|
||||||
|
}
|
||||||
8
nix/netboot.nix
Normal file
8
nix/netboot.nix
Normal file
@ -0,0 +1,8 @@
|
|||||||
|
# NixOS netboot-specific configuration
|
||||||
|
{ config, lib, pkgs, workshopSrc, ... }:
|
||||||
|
|
||||||
|
{
|
||||||
|
imports = [ ./common.nix ];
|
||||||
|
|
||||||
|
# Netboot runs entirely from RAM by default (initrd contains squashfs)
|
||||||
|
}
|
||||||
45
nix/packages.nix
Normal file
45
nix/packages.nix
Normal file
@ -0,0 +1,45 @@
|
|||||||
|
# Shared package list for the Linux Performance Workshop
|
||||||
|
{ pkgs, kernelPackages ? pkgs.linuxPackages }:
|
||||||
|
|
||||||
|
with pkgs; [
|
||||||
|
# Build essentials
|
||||||
|
gcc
|
||||||
|
gnumake
|
||||||
|
binutils
|
||||||
|
pkg-config
|
||||||
|
|
||||||
|
# Performance and tracing tools
|
||||||
|
perf
|
||||||
|
strace
|
||||||
|
ltrace
|
||||||
|
htop
|
||||||
|
bpftrace
|
||||||
|
|
||||||
|
# Python ecosystem
|
||||||
|
(python3.withPackages (ps: with ps; [
|
||||||
|
pip
|
||||||
|
flask # for scenario7 pyroscope demo
|
||||||
|
]))
|
||||||
|
py-spy
|
||||||
|
|
||||||
|
# Benchmarking and debugging
|
||||||
|
hyperfine
|
||||||
|
valgrind
|
||||||
|
flamegraph
|
||||||
|
|
||||||
|
# USDT/SDT support (provides sys/sdt.h)
|
||||||
|
libsystemtap
|
||||||
|
|
||||||
|
# Continuous profiling
|
||||||
|
pyroscope
|
||||||
|
|
||||||
|
# Utilities
|
||||||
|
curl
|
||||||
|
wget
|
||||||
|
git
|
||||||
|
file
|
||||||
|
which
|
||||||
|
less
|
||||||
|
vim
|
||||||
|
nano
|
||||||
|
]
|
||||||
33
nix/system-manager.nix
Normal file
33
nix/system-manager.nix
Normal file
@ -0,0 +1,33 @@
|
|||||||
|
# System-manager module for Ubuntu systems
|
||||||
|
{ config, lib, pkgs, ... }:
|
||||||
|
|
||||||
|
let
|
||||||
|
workshopPackages = import ./packages.nix { inherit pkgs; };
|
||||||
|
in
|
||||||
|
{
|
||||||
|
config = {
|
||||||
|
nixpkgs.hostPlatform = "x86_64-linux";
|
||||||
|
|
||||||
|
environment.systemPackages = workshopPackages;
|
||||||
|
|
||||||
|
# Create a script to configure perf permissions
|
||||||
|
# (system-manager cannot set sysctl directly)
|
||||||
|
environment.etc."perf-workshop-setup.sh" = {
|
||||||
|
mode = "0755";
|
||||||
|
text = ''
|
||||||
|
#!/bin/sh
|
||||||
|
# Run this script to enable perf for non-root users
|
||||||
|
echo "Setting kernel.perf_event_paranoid=1..."
|
||||||
|
sudo sysctl -w kernel.perf_event_paranoid=1
|
||||||
|
|
||||||
|
# Make it persistent
|
||||||
|
if ! grep -q "kernel.perf_event_paranoid" /etc/sysctl.conf 2>/dev/null; then
|
||||||
|
echo "kernel.perf_event_paranoid=1" | sudo tee -a /etc/sysctl.conf
|
||||||
|
echo "Added to /etc/sysctl.conf for persistence"
|
||||||
|
fi
|
||||||
|
|
||||||
|
echo "Done! You can now use perf as a regular user."
|
||||||
|
'';
|
||||||
|
};
|
||||||
|
};
|
||||||
|
}
|
||||||
Loading…
x
Reference in New Issue
Block a user